The band gap in a semi-conductor is 
. The maximum wavelength of electromagnetic radiation which can create a hole-electron pair in this semiconductor is equal to [Use 
]
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
We have
If 
is greater than 
, then energy of photon will be less than 
. So, electron hole pair will not generate. So, 
is maximum wavelength.
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